OAKLAND — Police are asking for the public”s help in locating a car they believe was used in a shooting that killed two men last month.

Friends and West Oakland residents Marcus Sims, 29, and Donald Ward, 22, were sitting in a van in the 1600 block of 10th Street when they were shot, police said. The shooting happened outside the Campbell Village housing development on January 20 and has not been solved.

A four-door, light blue 1994 Mercury Sable was seen fleeing the scene and police believe was driven by someone involved in the crime. Police released a surveillance photo of the car Monday.

Police and Crime Stoppers of Oakland are offering a reward of up to $20,000 for information leading to an arrest in this case. Anyone with information is asked to contact Oakland Police Department”s Homicide Section at 510-238-3821 or Crime Stoppers of Oakland tip line at 510- 777-8572.